I saw a man die today.

Right next to my work, a man smashed through a stoplight pole with his car taking down the 30 foot object. As I drove by I see ambulance giving CPR and compressions to his chest. Since CPR has such a grim rate of recovery I knew something was wrong. A few hours passed the road was cleared up as construction workers easily put a new stop light pole back in it's place. The road was cleaned up ok to drive on and it was like nothing ever happened...

He must have poked him. That is the most logical thing to do to test whether a man is still alive or not.

One could also tickle. But some people are not ticklish.

Kim Jong Il was poked.

--

ENTPs are very logical.

actually the accepted norm nowadays is to check one's brain activity to declare death. Poking is a natural step for sure but the uncertainty is very high and it has to be combined with multiple other factors. Otherwise a good proportion of sleepers could be declared dead on first contact.
Context is everything and all that.

An easier way to test for it is to check if one's still breathing. For example applying a cold surface next to the nose to see if water condensates on it. Again that only works reliably if the surface is significantly colder than the person and assuming no severe hypothermia or some other extreme states.

Expression of the post modern paradox : "For the love of god, religions are so full of shit"

Theory is always superseded by Fact...
... In theory.

“I’d hate to die twice. It’s so boring.”Richard Feynman's last recorded words

"Great is the human who has not lost his childlike heart."Mencius (Meng-Tse), 4th century BCE

What matters here is that OP believes he saw a man die, the truth is irellivant since we're unlikely to be effected by the event itself. If he didn't die, then we can just sit here and fully contmplate the fact that in this moment some other man somewhere somehow has in fact died.